gr2k wrote:is there any way to set the proximity warning to 2000m instead of the default 1000m
Of course there is. But if you're traveling even 5 km/h above the indicated speed limit, your GPS will be incessantly alerting you for a much longer time until you clear the radius. That will be irritating to you after a while, trust me.
1km proximity warning should be sufficient for the average motorist.